Alert archive / Nebraska / Special Weather Statements in 2021

Special Weather Statement, NWS North Platte, NE

September 4, 2021Custer County, Nebraska

NWS North Platte, NE issued this special weather statement at Sep 4, 2021, 9:35 PM CDT for Custer County, Nebraska. It was in force for 40 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Sep 4, 2021, 9:35 PM CDT (02:35 UTC)
Expired: Sep 4, 2021, 10:15 PM CDT
In force: 40 min
Issued by: NWS North Platte, NE
Hail: 0.25 in
Wind: 30

County Custer County, NE

The radar

The North Platte radar (KLNX), 80 km from the middle of the area, began a volume at 02:36 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 2.6 hours before the alert went out and 49 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 724 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 1466 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 34 m²/s²
0-3 km storm-relative helicity: 143 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

As transmitted.

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS North Platte, NE wrote its last area forecast discussion before this special weather statement went out at Sep 4, 6:26 PM CDT, 3 hours 9 minutes earlier.

Area forecast discussion, Sep 4, 6:26 PM CDT, 3 hours 9 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

Hazardous weather outlook, Sep 4, 2:47 PM CDT, 6 hours 48 minutes before

Hazardous Weather Outlook
National Weather Service North Platte NE
247 PM CDT Sat Sep 4 2021

NEZ004>010-022>029-035>038-056>059-069>071-094-052000-
Sheridan-Eastern Cherry-Keya Paha-Boyd-Brown-Rock-Holt-Garden-
Grant-Hooker-Thomas-Blaine-Loup-Garfield-Wheeler-Arthur-McPherson-
Logan-Custer-Deuel-Keith-Perkins-Lincoln-Chase-Hayes-Frontier-
Western Cherry-
247 PM CDT Sat Sep 4 2021 /147 PM MDT Sat Sep 4 2021/

This Hazardous Weather Outlook is for portions of western and
north central Nebraska.

.DAY ONE...TONIGHT.

Scattered showers and thunderstorms may affect portions of western
and north central Nebraska late tonight, mainly after midnight.
The threat of severe weather appears low.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

Remnant thunderstorms are possible Sunday morning over north
central Nebraska, clearing out by midday. The threat of severe
weather is low.

Precipitation chances beyond Sunday are minimal.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed through tonight.

&&

Get your weather, hydrological, and climate information at
http://www.weather.gov/northplatte

In the hours before

Special weather statement, Sep 4, 9:35 PM CDT, 0 minutes before

Special Weather Statement
National Weather Service North Platte NE
935 PM CDT Sat Sep 4 2021

NEZ038-050315-
Custer NE-
935 PM CDT Sat Sep 4 2021

...A strong thunderstorm will impact portions of southwestern Custer
County through 1015 PM CDT...

At 935 PM CDT, Doppler radar was tracking a strong thunderstorm over
Arnold, or 19 miles east of Stapleton, moving southeast at 20 mph.

HAZARD...Winds in excess of 30 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Arnold, Callaway, Finchville, Lodi and Milldale.

This includes Highway 92 between mile markers 247 and 255.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 4144 10025 4150 10013 4123 9976 4108 10005
TIME...MOT...LOC 0235Z 324DEG 17KT 4141 10014

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...30 MPH

NMJ

The office that day

Everything else NWS North Platte, NE issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 5, 1:10 AM CDT	Special Weather Statement	LBF	Loup	50 min
Sep 5, 1:52 AM CDT	Special Weather Statement	LBF	Garfield	38 min
Sep 5, 2:26 AM CDT	Special Weather Statement	LBF	Keith	49 min
Sep 5, 2:39 AM CDT	Special Weather Statement	LBF	Garfield	51 min
Sep 5, 3:13 AM CDT	Special Weather Statement	LBF	Keith	47 min
Sep 5, 3:26 AM CDT	Special Weather Statement	LBF	Arthur	49 min
Sep 5, 3:38 AM CDT	Severe Thunderstorm Warning	LBF	Arthur, Keith	37 min
Sep 5, 4:07 AM CDT	Special Weather Statement	LBF	Keith	38 min
Sep 5, 4:18 AM CDT	Severe Thunderstorm Warning	LBF	Arthur	42 min
Sep 5, 4:22 AM CDT	Special Weather Statement	LBF	Keith	38 min
Sep 5, 4:56 AM CDT	Special Weather Statement	LBF	Lincoln	49 min
Sep 5, 5:01 AM CDT	Special Weather Statement	LBF	Arthur	44 min
Sep 5, 5:37 AM CDT	Special Weather Statement	LBF	Lincoln	38 min
Sep 5, 6:25 AM CDT	Special Weather Statement	LBF	Frontier	50 min
Sep 5, 7:00 AM CDT	Special Weather Statement	LBF	Frontier	45 min
Sep 5, 7:33 AM CDT	Special Weather Statement	LBF	Holt	42 min
Sep 5, 7:36 AM CDT	Severe Thunderstorm Warning Considerable damage threat	LBF	Holt	39 min
Sep 5, 8:14 AM CDT	Special Weather Statement	LBF	Blaine	46 min
Sep 5, 8:16 AM CDT	Special Weather Statement	LBF	Holt	44 min

Nearby

Special Weather Statements in Nebraska, 2021 Every special weather statement in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.